INDIUM

(Lat.), n. n. Iand'ia-um(um). From IvSiitov. indigo. A metallic element discovered in 1863 by Reich and Richter. It is a white, very soft and easily malleable substance, not tarnishing by exposure to air, having the sp. gr. of 7'42, and melting at 176. In compounds it acts as a trivalent radicle, forming salts analogous to those of aluminium. Symbol, In; atomic weight. 113'4. It is very similar to cadmium in its relation to other substances. [B, 3; " Proc. of the Am. Pharm. A oc.," xiv (, 39).] Hydrate*! i. oxide. A white substance. In,O4H6. obtained by precipitating its salts. It is gelatinous when moist, horn-like when dried. ["Proc. of the Am. Pharm. A oc.," xxi (o, 39).] I. acetate. A substance, (CsH,Oj)In7. obtained by di olving hydrated i. oxide, freshly precipitated from cold solution, in glacial acetic acid, and evaporating the solution to crystallization. It forms tufts of silky, glistening needles, readily decomposed, and consequently not of constant composition. ["Proc. of the Am. Pharm. A oc.," xxi (a, 39).J I. alum, I. and ammonium Hiilphate. A compound of the formula In,(SO4),.(NHi)7SO1 + 24H,O. [B. 3.] I. and pntusMiiim cyanide. A salt obtained by treating a solution of an i. salt with pota ium cyanide. It exists only in solution, hydrated i. oxide being deposited on evaporation. [" Proc. of the Am. Pharm. ASHOC.," xxi (a, 30).] I. bichloride. A compound. InCla. obtained by heating gaseous hydrochloric acid with metallic 1.; an amber A. ape; A, at; A, ah; A. all; Ch, chin; Ch, loch (Scottish); [s. 450]